Python 在Django admin中自动完成相关字段筛选

我想有一个很好的自动完成程序在我的Django管理后台过滤出结果在project模型根据subject附加到person.这是我的models.py:

class Subject(models.Model):
    name = models.CharField(max_length=200)

class Person(models.Model):
    subject = models.ForeignKey(Subject, on_delete=models.CASCADE, blank=True, null=True)

class PersonRole(models.Model):
    project = models.ForeignKey('Project', on_delete=models.CASCADE)
    person = models.ForeignKey(Person, on_delete=models.CASCADE)

class Project(models.Model):
    person = models.ManyToManyField(Person, through=PersonRole)

现在，我设法得到一个简单的列表使用SimpleListFilter和以下代码admin.py:

class PISubjectFilter(admin.SimpleListFilter):

   title = 'PI Subject'
   parameter_name = 'subject'

   def lookups(self, request, model_admin):
        return Subject.objects.values_list("id", "name").order_by("id")

   def queryset(self, request, queryset):
       count = range(1, 100)
       for x in count:
           if self.value() == str(x):
               return queryset.filter(
               person__personrole__person__subject=x
               ).distinct()
               break

如何将这个长长的列表变成一个自动完成的列表？

我已经almost通过为我的表单指定一个自定义模板来达到我想要的目的，如下所示:

{% load i18n %}
{% load static %}
<script src="https://code.jquery.com/jquery-3.7.1.min.js" integrity="sha256-/JqT3SQfawRcv/BIHPThkBvs0OEvtFFmqPF/lYI/Cxo=" crossorigin="anonymous"></script>
<link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" />
<script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script>

<details data-filter-title="{{ title }}" open>
  <summary>
    {% blocktranslate with filter_title=title %} By {{ filter_title }} {% endblocktranslate %}
  </summary>

  <select id='select_subject' onchange="location = this.value;">

  {% for choice in choices %}

  <option value="{{ choice.query_string|iriencode }}">{{choice.display}}</option>

  {% endfor %}

</select>

</details>
<script>
  $(document).subject').select2();
});
  </script>

这实际上创建了自动完成子目录，尽管在每个页面重新加载时，choice.selected保持不变，因此所选项目不会被更新.不管怎样，我相信有一种不那么笨重的方法来做这件事.

PS:不，就像

class SubjectFilter(AutocompleteFilter):
    title = 'Subject'
    field_name = 'person__personrole__person__subject'

不工作(Project has no field named 'person__personrole__person__subject')